As far as I am aware, bad caps on boards of G series for example, could also take down a switched mode power supply quickly to it's death.
Perhaps also a bad stock switched mode PSU can also cause damage to caps on G series boards..

after replacing a G series PSU, I would highly recommend to check for bad caps on the cards inside.
this document, and this one could help diagnose/repair.

Also this document could be handy I think.

Hope this info helps..